Envelop.



A. W. OLAPP. ENVELOP. APPLICATION FILED FEB. 7, 1914.

Patgnted Jan. 26, 1915.

barren snares PATENT neuron- ARTHUR W. CLAPP, OF SAN FRANCISCO,CALIFORNIA, ASSIGNOR 'IO "FRANK E. MILK,

OF MINNEAPOLIS, MINNESOTA.

ENVELOP.

Specification of Letters Patent.

Patented Jan. 2'53, 19115.

Application filed February 7, 1914. Serial No. 817,196.

To all whom it may concern.

Be it known that-T, ARTHUR W. CLAPP, a citizen of the United States,residing at San .Francisco, in the city and county of San My inventionrelates to envelops and particularly to the type of envelop which isused for'transm'ission in the mails of money or documents of relativelygreat value.

The object of my invention is to provide an envelop for the abovepurpose formed with permanentlv sealed end flaps of relatively smallwidth and having a folding sealing flap of such shape that the seams ofthe end flaps will be covered bv the gum of the folding flap so thatsaid end flaps are additionally secured to the body of the envelop bysaid folding flap, and forming said folding flap with a cut-away portionat the center thereof which removes the major part of the body of thefolding flap and gives a sealing surface of relatively large extent. Bythese means the envelop thus formed will be very perfectly andetiicientlv sealed so as to have no exposed'seam edges and at'the sametime will be relatively light when the character of said envelop and thenature of the stock used therein is considered.

The full objects and advantages of my invention will appear inconnection with the detailed description thereof and are particularlvpointed out in the claim.

In the drawings. illustrating the application of my invention in oneform. Figure 1 is a view of my improved envelop with the flap extended.Fig. 2 is a similar view with the flap closed.

The sidesof the hodv 10 of the envelop are secured together at th'e endsby narrow flaps 11 and 12 securely ,qummed upon the bodv 10. Preferablya portion of the sides is folded over with the sealing flap 13 upon aline indicated at 14. The flap 13 has the sides thereof extending at avery slight-a31- gle inwardly from the end edges of the envelop. and the'interirir portion of the flap 13 is cut away. as indicated at 15.preferably along a circular line. The gum is applied in a broad strip16, 17 down each side of the end edges of the flap 13 and in a similarstrip 18 alongthe inwardly curved edge 15,

the strip of gum 18 preferably lapping over upon the upper part of side10, as indicated When the above envelop is turned down into sealingposition, as shown in Fig. 2, the gum strips 16 and 17 will lap over theseam of the end flaps 11 and 12, part of said gum adhering to the flaps11 and 12 and part to the body portion 10 of the envelop. The ex-'tended strip 18 will seal uniformly upon the flap surface of side 10,the portion 19 sealing the inturned edge of said side upon the body ofthe side 10. l/Vhen so sealed, as clearly indicated, the envelop has amuch extended sealing portion on the flap adhering to the side of theenvelop. and the seams of the end flaps 11 and 12 will be overlapped bythis sealing surface comprised in the gummed portions 16 and 17. At thesame time, by reason of the cut out portion 15, the movable flap will berelatively light in weight and comprising a small amount of materialwhile at the same time providing an exceedingly effective and widelyextended sealing surface. This not only results in a saving in weight ofmaterial and consequent savins of postage but in an adhering surfacewhich may be more efi'ectively applied in sealing the envelop.

I claim:

An envelop having narrow end flaps secured to the body of the envelop. asealing fiap formed of an extended portion of one side of the envelop. aless extended port on of the other side of the envelop being folded overwith said sealing flap and comprising a portion thereof. said sealing"flap being formed with gummcd portions for overlying the edges of theend flaps and being cut awav between said end sealing portions to apointnear the edge of the side of the envelop which is turned over with thesealing ARTHUR W. CLAPP.

Witnesses FRED E. PARKER, Frances SPROUL.

